[PATCH 3.16 187/346] scsi: fix upper bounds check of sense key in scsi_sense_key_string()

From: Ben Hutchings
Date: Sun Nov 13 2016 - 22:14:35 EST


3.16.39-rc1 review patch. If anyone has any objections, please let me know.

------------------

From: Tyrel Datwyler <tyreld@xxxxxxxxxxxxxxxxxx>

commit a87eeb900dbb9f8202f96604d56e47e67c936b9d upstream.

Commit 655ee63cf371 ("scsi constants: command, sense key + additional
sense string") added a "Completed" sense string with key 0xF to
snstext[], but failed to updated the upper bounds check of the sense key
in scsi_sense_key_string().

Fixes: 655ee63cf371 ("[SCSI] scsi constants: command, sense key + additional sense strings")
Signed-off-by: Tyrel Datwyler <tyreld@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Bart Van Assche <bart.vanassche@xxxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
drivers/scsi/constants.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/scsi/constants.c
+++ b/drivers/scsi/constants.c
@@ -1335,9 +1335,10 @@ static const char * const snstext[] = {

/* Get sense key string or NULL if not available */
const char *
-scsi_sense_key_string(unsigned char key) {
+scsi_sense_key_string(unsigned char key)
+{
#ifdef CONFIG_SCSI_CONSTANTS
- if (key <= 0xE)
+ if (key < ARRAY_SIZE(snstext))
return snstext[key];
#endif
return NULL;